You are right, it is! Good eye! I think the 2nd one to the left of Anastasia's portrait is one of Alexei around 1911 in one of his little uniforms.
It looks like be picture next to the regiment one is of a lady in a bustle, Marie Feodrovna, maybe... What do you think?
On a side note, I love the vases of twigs and the plant behind them. The sofa Nicholas is sitting on is odd, though, it looks like it's made out of birchbark! I like the way the books are scattered on that shelf, reminds me of just any old family's bookshelf, kind of mine's, actually!